<Could Trump actually be Jesus?>
No.
<So why does Jesus need to come back in the flesh?>
I don't think anyone said he does.
<Could it be that Trump is actually Jesus, reborn?>
No.
<Could the Trump line "lets make America great again" be code for "lets establish the kingdom of heaven on earth?">
I'd answer No again, but this one is even stupider code-breaking than finding prophesies of disasters in the Bible AFTER they've happened, so it just gets a facepalm.
<Could Trump's wealth be the modern world equivalent of Jesus' glory?>
Given that he (Jesus Mk.I) preached about giving everything you own to the poor, No.
<Could Trump sitting in his private jet fulfill the prophecy about "the son of man coming in the clouds"?>
Lots of people own or have access to private jets. Even more fly commercially regularly. So this is a terrible selection criteria for Jesus Mk.II.
<Trump looks like the only man who can repair America after 8 years of dictatorship by the Muslim Kenyan communist.>
No religious test for the office of the president, he has an American birth certificate and 'communist' is not a catch-all word meaning 'anyone with public policies I don't agree with'.
<Trump loves America and has promised to make America great again.>
Same hollow soundbite promise every politician makes. It's the fortune cookie of the electoral campaign. Looks great, but is empty and bland and it's the inner message you should be looking at.
<He will fulfill jesus' role and defeat evil by going to war against Muslim nations.>
Yes, because when George W. did the same thing, that solved all of America (and, to a lesser extent, the world)'s problems. Oh, wait. No it didn't.